Marine vessel



FIG. 1 is a perspective view illustrating my design for a marine vessel;

FIG. 2 is a right side elevation view thereof;

FIG. 3 is a left side elevation view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a top plan view of the marine vessel with the top removed;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a front elevation view thereof; and,

FIG. 8 is a rear elevation view thereof.

The broken lines shown are included for the purpose of illustrating the unclaimed portions of the marine vessel and form no part of the claimed design. 

CLAIM The ornamental design for a marine vessel, as shown and described. 